Fastener for driving belts or bands.



PATENTED NOV. 21, 1905.

H. TARBUGK. FASTENER FOR DRIVING BELTS OR. BANDS.

APPLIOATION FILED JAN.4, 1905.

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FASTENER FOR DRIVING BELTS OR BANDS.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed January 4:, 1905. Serial No- 239,671.

To all whom it mug concern.-

Be it known that I, HERBERT TARBUoK, a subject of the King of GreatBritain, residing at 4:5 Claremont road, Sparkbrook, in the city ofBirmingham, England, have invented new and useful Improvements Relatingto Fasteners for Driving Belts or Bands, of which the following is aspecification.

This invention relates to driving belt or band fasteners of the type inwhich clamping or like metallic plates are employed for connecting thetwo ends of the leather or other strap or belt to make the latter of acontinuous form.

The object of my invention is to provide in a'simple and convenientmanner for the more effective and reliable union of the aforesaid ends,and thus prevent accidental detachment when in service by a gradualpulling of the same from the fastener under the tension imposed upon thebelt or band when transmitting power from a driving to a driven wheel orpulley.

The invention comprisesametallic fastener adapted to embrace the ends ofa belt and to be so clamped or pressed upon the same as to make jointsor connections of a substantially wedge-like formation, such as willeffectually resist the withdrawal of the belt ends from the fastenerunder the tension of working, while relieving the clamping bolts,rivets, or the like from shearing or cross stress.

Referring to the accompanyingsheet of explanatory drawings, Figure 1 isan endelevation, and Fig. 2a side elevation, of one form of mybelt-fastener, drawn to an enlarged scale, suitable for use with anordinary flat or thin rectangular driving belt or band. Fig. 3 is a planof the fastener with a portion of the top plate removed. Figs. 4 and 5,respectively, illustrate the preferred form of clam ping nuts and bolts.Fig. 6 is a sectional elevation, and Fig. 7 a plan, showing the ends ofa belt united or connected by the fastener. Figs. 4 and 5 are drawn to alarger scale than that adopted for the other figures.

The same reference-letters in the different views indicate the same orsimilar parts.

I preferably construct my fastener from a pair of steel or other metalplates, as a and b, and an interposed central strip or bridge orstrut-piece, as 0. The said bridge or strutpiece 0 serves also as themeans for rigidly uniting the plates a and 5, suitable projections, as(i, being provided on each side of 0 for rivetingin co rrespondingapertures formed in the respectiveplates. Holes are made through theplates 0 and b for the reception of the clamping bolts and nuts, thosein one I plate being provided with slots so as to form (See Fig. 3.) Thesaid bolts and a keyhole. nuts are preferably of the form illustrated atFigs. 4 and 5, respectively. The nut e is providedwith a conicalextension, as shown at Fig. 4.. The bolt f is fitted or provided with asnug g beneath the head h, as shown at Fig. 5, which engage in the slotsof thekeyholes.

For the connection of the ends of a belt, as d, by means of my fastenerthe clamping bolts and nuts are removed and boltholes are punchedthrough the belt ends to correspond with the like holes in the fastener.The belt ends are then pushed in from the respective sides of thefastener until they abut against the central bridge or strut c. On nowreinserting the bolts and nuts in position they enter the holes in thebelt, and on tightening up the nuts with a spanner or wrench the outerextremities of the two plates (band 6 of the fastener are drawn towardand pressed tightly into or upon the leather or other material of whichthe belt is composed. A joint or connection of a substantiallywedge-like formation is thus made with each belt end, as shown at Fig.6. The said joints or connections ef' fectually resist thewithdrawal ofthe belt from the fastener under the tension of working, while relievingthe clamping bolts and nuts from shearing or cross stress. The drawingor compressing of the outer extremities of the fastener, top and bottomplates toward each other, as aforesaid, sets up a spring-like reactionwhich serves to lock the nuts 6 in position upon their bolts and soprevent accidental slackening, and thereby placing the parts in relationto each other convergent from the bridge to the ends. To give a greatergrip upon the surface of the belt, I preferably chequer or roughen theinner surfaces of the clamping-plates, as with the portion of the inhersurface of the plate 5 (shown at Fig. 3) or in any other manner. 7

My fasteners are suitable for connecting the ends of driving belts orbands of asquare,V, or other section, such as are employed formotorvehicles and for other services, the number of clamping-bolts orthe like parts employed and the precise form or shape of theclampingplates being in all cases such as are necessary to meet anyparticular service or requirement.

Having thus described my invention, what I claim as new, and desire tosecure by Letters the belt ends to be united of clamping or embracingparts, a bridge or strut between the said parts, and bolts and nutsentering the belt and the clamping or e mbracing parts and drawing theparts together at their ends so that the parts converge from the bridgeto the ends.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HERBERT TARBUOK.

Witnesses:

EDWARD MARKS, JOHN MORGAN.

